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arXiv 1406.4601hep-ph
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强子暗辐射和暗物质的极小模型

A Minimal Model of Majoronic Dark Radiation and Dark Matter

We-Fu Chang, John N. Ng

摘要:

通过增加一个单位轻子荷的单重标量,推广了单重Majoron暗辐射模型。整体$U(1)_L$的自发破缺通过I型跷跷板机制将暗辐射与中微子质量产生联系起来。该模型自然有一个稳定的标量暗物质场。它还预测了质量小于1 GeV的光标量的存在,它与标准模型希格斯玻色子混合。我们进行了数值分析的模型参数施加的限制,从正确的遗物丰度和满足直接暗物质检测,罕见的衰变的B介子,和不可见的宽度的希格斯玻色子的界限。该模型的可行性,在容纳从银河系中心的伽马射线进行了讨论。该模型产生了新的罕见的希格斯玻色子玻色子衰变,如四μ介子的最终状态与位移的顶点。另一个独特的信号是两个μ子和丢失的能量反冲对μ子对。我们的结果还表明,暗辐射和跷跷板机制之间的桥梁将把跷跷板规模在1-100 TeV的范围内。

英文摘要:

We extend the singlet Majoron model of dark radiation by adding another singlet scalar of unit lepton charge. The spontaneous breaking of global $U(1)_L$ connects dark radiation with neutrino mass generation via the type-I seesaw mechanism. The model naturally has a stable scalar dark matter field. It also predicts the existence of a light scalar of mass less than 1 GeV that mixes with the Standard Model Higgs boson. We perform a numerical analysis of the parameters of the model by imposing constraints from giving correct relic abundance and satisfying bounds from direct dark matter detection, rare decays of B-meson, and invisible width of the Higgs boson. The viability of the model in accommodating the gamma rays from the Galactic center is discussed as well. The model gives rise to new rare Higgs boson decays such as four-muon final states with displaced vertices. Another unique signal is two muons and missing energy recoil against the muon pair. Our result also shows that such a bridge between dark radiation and the seesaw mechanism will put the seesaw scale in the range of 1-100 TeV.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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